X-ray clusters of galaxies as tracers of structure in the Universe
- 4 January 2001
- journal article
- review article
- Published by Springer Nature in Nature
- Vol. 409 (6816) , 39-45
- https://doi.org/10.1038/35051000
Abstract
Clusters of galaxies are visible tracers of the network of matter in the Universe, marking the high-density regions where filaments of dark matter join together. When observed at X-ray wavelengths these clusters shine like cosmic lighthouses, as a consequence of the hot gas trapped within their gravitational potential wells. The X-ray emission is linked directly to the total mass of a cluster, and so can be used to investigate the mass distribution for a sizeable fraction of the Universe. The picture that has emerged from recent studies is remarkably consistent with the predictions for a low-density Universe dominated by cold dark matter.Keywords
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